Parts by category

Unrivaled Armory Siege Brake .223/5.56 (SB3-5.56) 1/2"x28 Thread

Unrivaled Armory Siege Brake .223/5.56 (SB3-5.56) 1/2"x28 Thread

Unrivaled · Muzzle Devices

No ratings yet

Best price

$137.75at OpticsPlanet

In stock Sale checked Oct 31, 2026

Buy at OpticsPlanet

Compare 3 stores

Where to buy

StorePriceAvailabilityBuyAdd to build
OpticsPlanet Best price $137.75Salechecked Oct 31, 2026 In stock Buy at OpticsPlanet
AR15Discounts $138.00checked Oct 31, 2026 Check store Buy at AR15Discounts
Dirty Bird $138.00checked Oct 31, 2026 Check store Buy at Dirty Bird

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

Lowest in-stock price in the last 30 days: $137.75 at OpticsPlanet. Dashed line = out of stock. Tracking since Oct 28, 2026.

Show the prices as a table
StoreLatestLowestHighest
AR15Discounts$138.00$138.00$138.00
Dirty Bird$138.00$138.00$138.00
OpticsPlanet$137.75$137.75$137.75

Since Oct 28, 2026.

About this part

The Unrivaled Armory Siege Brake .223/5.56 (SB3-5.56) 1/2"x28 Thread is a muzzle brake from Unrivaled. It's sold by 3 stores (1 in stock), from $137.75 to $138.00. The lowest in-stock price in the last 30 days was $137.75 at OpticsPlanet.

Fits and works with

Caliber
5.56 / .223 · Shop matching ammo
Muzzle thread
1/2x28 · Muzzle devices

Specifications

Manufacturer
Unrivaled
Type
Muzzle Brake
Caliber
5.56 mm NATO

From the manufacturer

Experience unparalleled control and precision with the Unrivaled Armory Siege Brake .223/5.56 (SB3-5.56), the ultimate muzzle device designed to transform your AR-15 shooting experience. Engineered for .223/5.56 caliber rifles, this high-performance muzzle brake redirects gases efficiently to minimize recoil and muzzle rise, allowing for faster follow-up shots and improved accuracy during rapid fire. Whether you're a competitive shooter or a tactical enthusiast, the Siege Brake delivers the stability you need to stay on target without compromising on lightweight design. Key Features Advanced Baffle Design: Utilizes an extremely efficient baffle system to eliminate rear-directed recoil, reducing felt recoil by up to 60% for smoother shooting sessions. Precision Threading: Features standard 1/2"x28 threads for seamless compatibility with most .223/5.56 AR-15 barrels, ensuring a secure and easy installation. Versatile Caliber Support: Optimized for .223/5.56mm and 5.45mm cartridges, making it ideal for a range of modern sporting rifles. Durable Construction: Crafted from high-quality stainless steel with a bead blasted finish for corrosion resistance and long-lasting performance in demanding conditions. Includes Crush Washer: Facilitates proper timing and installation, helping achieve the legal 16-inch overall length on 13.7-inch or longer barrels. Specifications Muzzle Device Type: Muzzle Brake Threads: 1/2"x28 Cartridge Compatibility: .223/5.56/.224 Finish: Bead Blasted Stainless Weight: 3.2 oz Length: 3.1 inches Width/Height: 0.9 inches Why Choose the Siege Brake? In the world of .223/5.56 muzzle brakes, the Siege Brake stands out by addressing common shooter pain points like excessive muzzle flip and fatigue during extended range time. Its lightweight profile-under 4 ounces-maintains your rifle's balance without adding unnecessary bulk, perfect for dynamic shooting scenarios. Unlike heavier competitors, this brake offers superior recoil mitigation without the added concussion that can disrupt nearby shooters, though it does amplify side-blast for optimal performance. Users praise its ability to keep sights on target, enhancing speed and confidence in high-stakes environments. Backed by rigorous engineering, it's a reliable choice for anyone seeking to elevate their AR-15's handling. Don't let recoil hold you back-equip your rifle with the Unrivaled Armory Siege Brake today and unlock the full potential of your .223/5.56 setup for unmatched accuracy and control. Frequently Asked Questions Q: Will the Siege Brake increase noise levels? A: Yes, like most muzzle brakes, it redirects gases sideways, which can amplify perceived noise and side-blast. However, this trade-off provides exceptional recoil reduction for better shot placement. Q: Is it easy to install on my AR-15? A: Absolutely. It comes with a crush washer for precise timing, and the 1/2"x28 threading ensures compatibility with standard AR-15 barrels. Basic tools and safety precautions are all that's needed. Q: Does it affect bullet velocity? A: The minimal added length has negligible impact on velocity, focusing instead on stabilizing your rifle for consistent performance across various shooting applications.

Similar muzzle brakes

More Unrivaled parts

Rating

No ratings yet

Log in to rate this part.

Comments

Please log in to read and leave comments.

$137.75 at OpticsPlanet
Buy